Subtract 90/7 from 81/24
1st number: 3 9/24, 2nd number: 12 6/7
81/24 - 90/7 is -531/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 7 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
81/24 = 81 × 7/24 × 7 = 567/168 - Likewise, for the 2nd fraction, since 7 × 24 = 168,
90/7 = 90 × 24/7 × 24 = 2160/168 - Subtract the two like fractions:
567/168 - 2160/168 = 567 - 2160/168 = -1593/168 - After reducing the fraction, the answer is -531/56
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